Apparatus for the vulcanization of pneumatic tires with non-skid leather treads.



M. BERGOUGNAN.

APPARATUS FOR THE VULCANIZATION 0F PNEUMATIC TIRES WITH NON-SKID LEATHER TREADS..

APPLICATION FILED DEC- I6| 19H.

1, 170,600. Patented Feb. 8, 1916.

FIQZ- WITNESSES.

anion MATHI EUT BERGOUGNAN, 0F PARIS, FRANCE, ASSIGNOB'TO SOCIETE GENERALE DES ETABLISSEMENTS BERGOUGNAN; 0F GLERMlONT-FERRAND, FRANCE.

LEATHER BREAD S.

cence.

Specification of Letters latent.

Patented Feb. 8, 1916.

Application filed December 16, 1911. Serial No. 666,247.

To all hom-amayconcern 'Be-it known that I, MATHIEU Beacons- NA'N, citizen of France, residing at '9 Rue Villaret'de Joyeuse, Paris, in the Republic of France, have invented new and useful Improvements in Apparatus for the Vulcanization of Pneumatic Tires with Non SkidjLeather Treads, of which the following is a specification. 4

This invention has for its object to provide an improved apparatus for thehot vulcanization of pneumatic tires with non skid leather treads.

-The mold which contains the tire to be vulcanized is clamped between the heated plates" of a press, and is composed of two casing parts and a between-part or crown fitted between the inner edges of these casingparts. Each casing part is shaped internally to the exact shape of-the correspending half of. the tire including its thickened edges, except atthe place for the -non-skid studs where the casing parts have each a recess for the reception of those studs. one; construction of vulcaniz ing apparatus according to this invention is illustrated by way of example in. the accompanying drawing in which:

Figure l'is a partial cross section of the apparatus, and Fig. 2 is a diagrammatic partial view of a press with the mold in position therein.

As shown, the tire under. treatment 'comfprises a tire'proper or tire cover a and a non-skid tread or studded leather: band 6 .with, an interposed layer 0 of crescentshaped section composed of one or morethicknesses of canvas and rubber. 40

The above parts having been assembledyto form. the tire, the latter is placed in a mold coniposed of two metal casing partscl j with an interposed metal crown 9 having two an- .nular flanges 5 and connected to the casing parts. by means of tongue and groove joints.

-The internal cross sectional contour of the two casing parts when fitted together conformseXact-ly to'the' outer cross sectional contour of the combined tire andnon-skid band except the portions for receiving the studs h, for which purpose these portions.

are formed with recesses 0. The, crown g 'is designed to secure a tight joint at the thickened edges z" of the tire. For this purpose these edges 71 are made of such dimensions that when the crown and the casing parts. are assembled and the resulting whole is placed in the press, there will remain for the reception of the thickened edge of the tire between the annular flanges g of the crown and the casing parts, only a space which is smaller than the said thickened edges, so that the latter will be compressed to an extent suiiicient to effect an air-tight joint at those places. The whole consisting of the casing parts, the-crown, and the contained tire, is then placed between thev heating plates rs of a hydraulic press.-

A groove j (Fig. 2) is provided in the outer face of one of the casing parts diorthe reception of a pipe 72 terminating at one end in a cock l adapted tobe connected to a to-betr'eated. I This pressure being supplied by an alrcompresso'r maybe maintained continuously at the exact amountdesired. j

The recesses 0 provided for the reception of studs @111 the inner faces ofthe casing parts near thelrjointmg edges communicate freely with the atmosphere by means .of' small vents g9 constituted by grooves formed' inthe jointing faces of the casing bymeans of a strip 90f cotton fabric placed between the outside i'aceoi the leather band parts in ,suitable number: and distribution at the periphery. By that arrangement and.

and the inside face of the casing parts, the

presence of'a thin layer of air between the metal-.cas1ng parts and the leatheris secured, which air protects the leather and prevents it from being burned by the heat of the casing parts.

} Having now described my invention, what I claim as new and, desire to secure by LettersPatent isz.

1. In an apparatusfor vulcanizing pneumatic tires having non-skid bands of leather or similar-material, a mold adaptedjto fit a tire of the class described, said mold havinga recess adapted to surround-the non-skid band of the tire, anda foraininous member positioned within the said recess in interposed relationto the said tire band and the mold walls, the mold being provided with air ducts leading outwardly from the recess at a'nuniber of places to aiiord a circulation of air within 'the interstices of the 'foraminous member.

2. In an apparatus for vulcanizing pneumatic tires having non-skid bands of leather or similar material, a mold adapted to fit a tire of the class described, said mold having a recess adapted to surround thenon-skid band of the tire, and a fabric sheet positioned within the said recess in interposed relation to the said tire/band andthe mold walls, the mold being provided with air ducts leading outwardly from the recess at'a number of places to aflt'ord a circulation of air within the interstices of the fabric sheet.

3. In an apparatus for vulcanizing pneumatic tires having non-skid bands of leather or similar material, an annular mold adapted to fit a tire-of the class described, said mold recess adapted to surround the non-skid band of the tire, said recess being provided "with an enlarged central portion for the accommodation of the studs of the band, and a foraminous member positioned within the said recess in interposed relation to the said tire band and the mold walls, the mold being provided with circumferentially spaced air ducts leading outwardlv from the enlarged ortion of the recess tothe atmosphere to afford a circulation of air within the recess and the interstices of the foraminous member.

5. In an apparatus. for vulcanizing pneumatic tires having non-skid bands of leather or similar material, a mold adapted to fit a tire of the class described, said mold having a recess. adapted to surround the non-skid band of the tire, a foraminous member position'ed within the said recess in interposed relation to the said tire band and the mold walls, the mold being provided with air ducts leading outwardly from the recess at a number of places to afford a circulation of air within the interstices of the foraminous member, and means for supplying air under prelsgure to the tire positioned within the mo and forming ductsadapted to afford a cir-" culation of air within the recess, and a foraminous member positioned within the recess in interposed relation to the said tire. band and the mold walls.

7. In an apparatus for vulcanizing pneumatic tires havin non-skid bands of leather or similar material, an annular split mold adapted to embrace a tire of the class described and to fit between the heated plates of a press, an annular crown adapted to fit within the mold in engagement with the base flanges of the tire to press the same against the sides of the mold and effect an air-tight joint, the said crown being provided with a radial opening communicating with the interior of the mold, the mold being provided in one of its exterior side faces with a radial groove, a tube for admitting air under pressure to the interior of the tire positioned within the mold, the said tube being arranged in communication with the crown opening and being extended outwardly from between the heated plates of the press through the said groove in the mold, and means provided within the mold for protecting the non-skid band of the tire from overheating.

8. Inanapparatus'for vulcanizing pneumatic tires having non-skid bands of leather or similar material, an annular split mold adapted to embrace atire of the class described and to fit between the heated plates of a press, an annular crown adapted to fit within the mold in engagement with the base flanges of the tire to press the same against the sides of the mold and eilect an air-tight joint, the said crown being provided with a radial opening communicating with the interior of the mold, the mold being provided in one of its exterior. side faces with a radial groove, a tube for admitting air under pressure tothe interior of the tire positioned within the mold, the said tube being arranged in communication with the crown opening andbeing extended outwardly from between the heated plates of the press through the said'groove in the mold, the mold being provided further with recess portions in its interior surfaces which register and surround the non-skid band of the tire, and a toraminous member positioned within the said recess in interposed relation to the said tire band and the mold Walls, the

mold b eing'provided with air duets leading name tn this specification in the presence of outwardly from the recess at a number of two subscrlblng witnesses.

places to the atmosphere to aifprd a circuv MATHIEU BERGOUGNAN. lation' of air within the interstices of the Witnesses: 5 foraminous member. ANTOINE LAVOIS, In testimony whereof I have signed my 11 C.-COXE.

dopies of this patent may be obtained for. five cents each, by addressing the Commissioner of Patents,

Washing'tbn, D. C. 

